1


                                                                  EXHIBIT (a)(1)

                               ANGELES PARTNERS XI
                     1873 South Bellaire Street, 17th Floor
                             Denver, Colorado 80222

                                 August 19, 1999

Dear Limited Partner:

         Enclosed is the Schedule 14D-9 which was filed by Angeles Partners XI
(the "Partnership") with the Securities and Exchange Commission in connection
with an offer by AIMCO Properties, L.P., a Delaware limited partnership (the
"AIMCO Operating Partnership"), to purchase units of limited partnership
interest in the Partnership.

         The Partnership's general partner, Angeles Realty Corporation II, is an
affiliate of the AIMCO Operating Partnership and therefore has certain conflicts
of interest in connection with the response to the offer. THE PARTNERSHIP AND
THE GENERAL PARTNER ARE REMAINING NEUTRAL AND MAKING NO RECOMMENDA TION AS TO
WHETHER LIMITED PARTNERS SHOULD TENDER OR REFRAIN FROM TENDERING THEIR UNITS.
Although the general partner believes the offer is fair, limited partners must
make their own decision whether or not to participate in the offer, based upon a
number of factors, including a limited partner's financial position, the need or
desire for liquidity, other available financial opportunities, and a limited
partner's tax position and the tax consequences to of selling one's units.

         Limited Partners should carefully read the enclosed Schedule 14D-9, the
Offer to Purchase of the AIMCO Operating Partnership, dated August 19, 1999
relating to the offer to acquire units of the Partnership (the "Offer to
Purchase"), and the related Letter of Transmittal and Instructions. Certain
information in the Schedule 14D-9 is incorporated by reference to the Offer to
Purchase.

                                       ANGELES REALTY CORPORATION II
                                       General Partner


                                       By: /s/ Patrick J. Foye
                                           -------------------------------------
                                           Executive Vice President